Hi, Thanks for your quick replies. I have tried this method but however I am getting a row returned for each entry in ForcedSpiroTable or RelaxedSpiroTable that matches the search criteria.
i.e. If a single patient say "Joe Bloggs" has 5 tests, all with EVC and FVC greater than 2.0 then I get Joe Bloggs Joe Bloggs Joe Bloggs Joe Bloggs Joe Bloggs What I want is Joe Blogs just the once. Does this make sense? What I need to do is find all patients that have an EVC and FVC greater than 2.0. Is there a way to do this? Am I missing something? Thanks again Mark > -----Original Message----- > From: Dennis Cote [mailto:[EMAIL PROTECTED] > Sent: 01 May 2007 15:31 > To: sqlite-users@sqlite.org > Subject: Re: [sqlite] SQL query help (mutiple joins) > > > Allan, Mark wrote: > > I have a database that looks something like the following:- > > > > PatientsTable { ID, Name, Sex, ....} > > ExaminationsTable { ID, PatientID, ....} > > TestTable { ID, ExamID, .....} > > ForcedSpiroTable { ID, TestID, EVC, IVC, IC ... } > > RelaxedSpiroTable { ID, TestID, FVC, FEV1, PEF, ...} > > > > Can someone help me out with the syntax for applying a > search for all rows in the PatientsTable that have a > ForcedSpiroTable.EVC > 2.0 and a RelaxedSpiroTable.FVC > 2.0? > > > > > > Basically ExaminationsTable has a foreign key to > PatientsTable, TestsTable has a foreign key to > ExaminationsTable and both ForcedSpiroTable and > RelaxedSpiroTable have a foreign key to the TestTable. > > > > > > > Mark, > > This should do the trick: > > select p.* > from PatientsTable as p > join ExaminationsTable as e on e.PatientID=p.ID > join TestTable as t on t.ExamID=e.ID > join ForcedSpiroTable as f on f.TestID=t.ID > join RelaxedSpiroTable as r on r.TestID=t.ID > where f.EVC > 2.0 and r.FVC > 2.0; > > HTH > Dennis Cote > > -------------------------------------------------------------- > --------------- > To unsubscribe, send email to [EMAIL PROTECTED] > -------------------------------------------------------------- > --------------- > > > > > > DISCLAIMER: This information and any attachments contained in this email message is intended only for the use of the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution, forwarding, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by return email, and delete the original message immediately. ----------------------------------------------------------------------------- To unsubscribe, send email to [EMAIL PROTECTED] -----------------------------------------------------------------------------
